
Job Title: Java Developer
Experience: 4 –10 Years
Location: Mumbai / Bangalore
Employment Type: Full-time
We are looking for experienced and passionate Java Developers with strong expertise in Core Java, multithreading, and performance tuning. You will be responsible for designing and developing high-performance, scalable, and resilient backend systems. This is an exciting opportunity to work on complex, enterprise-level systems and modern architectures like microservices and event-driven frameworks.
• 3–10 years of hands-on experience in Java (8 or above) development.
• Strong foundation in OOPs, data structures, algorithms, and design patterns.
• Deep understanding of multithreading, concurrency, and synchronization techniques.
• Experience with Spring Boot, Spring MVC, JPA/Hibernate.
• Good working knowledge of RESTful API development.
• Proficient in SQL and experience with relational databases like MySQL, PostgreSQL, etc.
• Familiarity with Git, Maven/Gradle, and CI/CD pipelines.
• Exposure to Agile/Scrum methodology

About Wissen Technology
About
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains.
With offices in US, India, UK, Australia, Mexico, and Canada, we offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
Connect with the team
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Position: Sr. Java Developer
Qualification: BE, B. Tech, MCA, M. Tech
Experience: 6+ Years
Skills:
Java 8+, Microservices, Spring Boot, Nosql, Kubernetes, AWS, REST
Job Role and Responsibilities:
- Bachelor’s degree in Computer Science or equivalent
- Min 6 years of development experience in Spring Boot & Microservices architecture
- Working experience with Java, Spring Boot, Hibernate, MySQL, Spring Data JPA, AWS, Spring Cloud, Maven, GitHub, Swagger, Eureka, Zuul etc.
- Strong understanding of API Security for Microservices (Spring Security, OAuth 2.0, JWT)
- Strong understanding of web development cycle and programming techniques and tools
- Ability to work independently or with group
- Strong understanding of modern development methodologies and best industry standards
- Experience working with APIs, RESTful APIs & Microservices
- Experience building highly scalable applications using Redis, Kafka, Akka, gRPC
- Mentor, Train 3-4 engineers
- AWS knowledge is a plus
- Strong knowledge on SQL and NoSQL Databases
- Should have worked on developing large scale products and services
- Knowledge on Agile processes is a must
- Able to work with multiple distributed teams
About us:
TAPPP(https://tappp.com/) is building the next-generation digital platform by leveraging cell-based architecture to integrate technologies like Artificial Intelligence, Rules, Workflows, Microservices, FaaS (Function as a Service), Micro-frontends, and Micro apps to create a highly extensible and cutting-edge technology platform that brings together sports fans with broadcasters, sports teams, and sportsbooks to create a marketplace for all aspects of sports and we are available across platforms via the Web, Mobile, Roku, and Tablets.
Building out this brand presents significant product and engineering challenges. At the center of solving those challenges is the TAPPP Product Engineering team which is responsible for the TAPPP product end to end.
TAPPP is led by a very able leadership team drawn from Industry leaders from companies like ESPN, Amazon, Blackhawk, Kargocard, Visa, and
many others.
The organization is flat, processes are minimal, individual responsibility is big, and there is an emphasis on keeping non-productive influences out of the everyday technical decision-making process. Upholding these philosophies will be imperative as we execute our aggressive plan of global expansion over the next 2 years.
Who are we looking for:
A coding enthusiast who loves writing elegant code and developing software systems.
As a senior java developer, you will be a part of the core product development team that is responsible for building high-performant components of the TAPPP platform.
Your responsibility:
- You will be responsible for designing, coding, reviewing, testing, and bug-fixing different modules of the software product that needs to work seamlessly across different environments.
- Write production-quality code in Java, J2EE, and Spring
- You will work in an agile team, working on the TAPPP revolutionary platform. You‘ll be using cutting-edge solutions (Spring Boot, Docker, Kafka, Redis, Continuous Delivery) for creating and maintaining high-load distributed services that are part of our messaging platform.
Mandatory technical skills:
- Hands-on experience with
- Java 1.7+
- RDBMS (MySQL/PostgreSQL)
- JPA (Hibernate or any other ORM framework)
- Spring Boot, Spring MVC, Spring Security
- Hands-on experience in writing extensible RESTful APIs
- Hands-on in Java development (all facets of development) with a sound understanding of OOAD.
- Should have excellent debugging, code review, and design review skills
- Should have a sound understanding of a Microservice based architecture
Good to have technical skills:
Kafka
GraphQL
Redis
AWS (ECS, Cloudwatch)
Other
- Strong independent contributor
- Comfortable working in a start-up environment
The position is based in Pune, India.
These values bound our employees, customers and future businesses to keep trust and faith in the services we provide in covering Software and Hardware developments, Mechanical & Electronics that can translate into end-to-end design, development and maintenance of products and services to enable business growth and value creation.We think Business value add (as a first step) to create, design and deliver our solutions !!!
Job Description:
Key Responsibility Areas:
Design, build and deliver Enterprise software solutions.
Write code with standards and conventions and follow best practices.
Encourage and lead innovation and solid lifecycle processes.
Collaborate with development teams on work definition, estimation and prioritization
Lead and grow as a professional software engineer.
Full ownership of product deliveries and mentoring junior team members.
Preparing curriculum to train junior developers for Java Web Development
Strong client interactions to provide excellent Quality of Service.
Owning the code base and making sure all code is reviewed and is of very high quality.
Write and modify coding conventions and standards documents for all development
Required Skills:
Technologies/Frameworks –
Core Java, J2EE,
Spring Core and Spring MVC, Sprint Boot, Spring Security,
JDBC, Hibernate, RESTful APIs, SOAP WebServices
Knowledge of JavaScript, JQuery, AJAX, HTML5, and CSS3, Angular is added advantage
Junit or Mockito frameworks
Maven, Git
Knowledge Data Structures,
SQL, MySQL
Designing relational database schemas
Basics of AWS, Cloud, Microservices
Must have strong knowledge and experience in Agile based software development methodologies.
Knowledge of an Agile tool like Jira.
Strong knowledge of working in Integrations of 3rd party APIs and creating the new APIs.
Must have good knowledge of creating Flow diagrams, UMLs and all the required documentations.
Must have Team Lead exposure
Domain Preference
BFSI, FinTech
Qualification:
B.E., B.Tech. from reputed institutes with good academic record
Technical Requirement:
- At least 5 years of experience in Java, J2EE technologies.
- Expertise in doing development using Java, Spring Boot, Spring modules (Spring Security, Spring MVC, Spring Data JPA, etc.), Hibernate, Web Services
- Worked on REST web services.
- Worked on application server : Tomcat
- Worked on Eclipse IDE
- Knowledge of Swagger, Postman
- Worked on Database like MySQL
- Worked on Git, Maven, CI/CD pipelines
- Good to have knowledge of using Docker and Mongo DB
Knowledge & Experience required:
· Bachelor's degree in Computer Science Engineering or equivalent degree.
· 7 years of development experience as a seasoned Java developer
· 7 years of experience in developing enterprise applications using enterprise Java 8 and has worked both on Web and Server side technologies.
· A strong Java Backend Developer with Core Java 8, Spring, Spring Boot, Hibernate, REST Web-services.
· Expertise in Java Unit Testing Frameworks and tools such as JUnit, TestNG, Mockito etc.
· As a Senior developer, must be comfortable switching tasks between Web Services, APIs, Batch Job engine or Web Development.
· Passionate Java developer who is also a problem solver and has a very good understanding of core and advanced Java concepts.
· Good understanding of database and data fundamentals in SQL Server 2017, Oracle and NoSql databases.
· Good understanding of Web Service concepts and experience building RESTful services is required.
Job Description
We are looking for a developer to help maintain the existing Java applications, and to guide development of the next generation tools. The right individual for this role must be capable of building applications in Java, using modern architectures. Should be hands on in Object Oriented Languages (Java, C# and Go), Cloud Based Technologies (AWS, DevOps and Serverless), Front End Frameworks (Angular, React JS, Spring Boot, Spring React, Node.js), Cutting Edge Data Tools (Python, Spark, Machine Learning) and Next Generation technologies (AI, Blockchain) etc. You should be comfortable with application coding based on design and specifications, and also be comfortable working with application protocols such as JSON RPC, SOAP, and REST. The candidate must be a top-notch Java developer committed to becoming an integral part of and fostering growth within our development team.
Primary Responsibilities:
- Working with the architects and development lead, documents and develops best practices for development, and deployment of applications, and works with members to foster growth within the team.
- Develop user interface components and implementing them following well-known React.js workflows (such as Flux or Redux)
- Predicts application development requirements based on changes in underlying architecture
- Either individually or leading a team of resources, determines hardware/software systems requirements and leads systems hardware/software design. Analyzes, designs, programs, debugs, supports, and modifies software enhancements and/or new products used in local, networked, or Internet-related computer programs.
- Partners with the IT Architect during the initial stages of the project/solution to ensure the accuracy of business cases and that the solution will meet the business need.
- Completes documentation and procedures for installation and maintenance. May interact with users to define system requirements and/or necessary modifications.
Qualifications
- 5+ years of Java development experience, ideally in a team lead role
- High level skills in Java, (preferably java 1.8 – knows to write lambda expression, understands functions etc), using the latest SDKs and tools and frameworks such as Spring boot, spring JDBC, Spring test, spring security, RxJava, etc of Java
- Experience interfacing with back-end applications using MQ, SOAP, RESTFUL services, and JSON. - Worked on at least one of JaxRs implementations.
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- Thorough understanding of React.js and its core principles
- Understands database concepts – proficient in writing relational database queries – Oracle
- Ability to develop functional, technical and user interface designs for an application that meets the defined requirements (business, system performance and standards)
- Demonstrates deep expertise in specific coding concepts and/or languages, especially around modern application architectures.
- Experience with web applications that use responsive design to better support mobile browsers.
- Experience in highly-secured online environments that use n-tier designs and extensive fire walling to enhance security.
- Experience in multi data center physical implementation models for scalability and resilience.
- Experience partnering with others to solve problems quickly and efficiently.
3+ years of experience with development in JAVA technology.
Strong Java Basics
SpringBoot or Spring MVC
Hands-on experience with Relational Databases (SQL query or Hibernate) + Mongo (JSON parsing)
Proficient in REST API development
Messaging Queue (RabitMQ or Kafka)
Microservices
Any Caching Mechanism
Good at problem-solving
Good to Have Skills:
4+ years of experience in using Java/J2EE tech stacks
Good understanding of data structures and algorithms.
Excellent analytical and problem-solving skills.
Ability to work in a fast-paced internet start-up environment.
Experience in technical mentorship/coaching is highly desirable.
Understanding of AI/ML algorithms is a plus.
- Bachelor/Master's in computer science or relevant fields
- 10+ years of Relevant Experience
- Strong sense of ownership
- Excellent Java and object-oriented development skills
- Experience in building and scaling microservices
- Strong Knowledge in RDBMS & NoSQL databases
- Strong problem-solving skills, technical troubleshooting and diagnosing
- Expected to be a role model for young engineers, have a strong sense of code quality, and enforce code quality within the team
- Excellent understanding of Debugging performance and optimization techniques
- Experience in Java, Mongo, MySQL, AWS technologies, ELK stack, Spring boot, Kafka
- Experience in developing any large scale Experience in cloud technologies
- Demonstrated ability to deliver in a fast-paced environment
Qualifications & Responsibilities
- Strong hands-on experience with Java; full-stack development
- Designs, codes, tests, debug, and documents software, and enhance existing components to ensure that software meets business needs
- Deploy and maintain Applications/Systems
- Work with other software engineers for one or more Agile scrum teams assigned to work on the project · Contribute to the design and architecture to enable secure, scalable, and maintainable software and should be able to clearly articulate the implications of design/architectural decisions, issues, and plans to technology leadership
- Develop reusable patterns and encourage innovation that will enhance team velocity · Collaborate on the design with other team members and product owners, both inside and outside the scrum team
- Estimate engineering work effort for the engineering team and effectively identify and prioritize the high impact tasks
- Conduct design and code reviews to ensure code developed meets coding best practices guidelines, unit testing, security, and scalability and maintainability guidelines
- Drive a quality mindset within the team
Skills:
- 2+ years of full Software Development Life Cycle experience
- 2+ years of experience working as a full-stack java developer
- 1+ years of web development with AngularJS
- Experience or familiarity with technologies such as WSDL, REST and/or SOAP web services, XML, JBoss, Adobe CQ5 DAM, HTML5, CSS3, Bootstrap, Hibernate, Spring.







